Using your knowledge of marginal revenue product, explain the following:
a. A famous tennis star is paid $200,000 for appearing in a 30-second television commercial. The actor who plays his doubles partner is paid $500.
b. The president of an ailing savings and loan is paid not to stay in his job for the last two years of his contract.
c. A jumbo jet carrying 400 passengers is priced higher than a 250-passenger model even though both aircraft cost the same to manufacture.